Bernard frese



l'13. PRESE.; ROLLER ABSTRACTOR FOR WATCHES.

Mmmm l Y BERNAnD" FRESE, ion CHICAGO, I LLiNoIs.

IMPROVEMENTK'IN ROlL-.LER--ABXSTRACTORS FORfWATC'l-IES. Y'

Specification forming part of Letters Patent No. 189.307, dated April 10, 1877; application led May 29, 1876.

To alllwhom it may concern:

Be it known that I, BERNARD FREsE, of the city of Chicago, Cook county, State of Illinois, have invented new and useful Improvements in Roller Abstractors for Watches, of which the following is a full description, reference being had to the accompanying drawings, in whichy Figure l is a front elevation 5 Fig. 2, a side elevation; Fig. 3, a side view enlarged, some ofthe parts being shown in section; Fig. 4, a front view enlarged, some of the parts being shown in section; Fig. 5, a section on line .fr a' of Fig. 4, looking down. Fig. 6 represents the balance-wheel and roller thereon.

The object of my invention is to provide an instrument by the use of which the roller can be easily Yremoved from the balance- Wheel of a watch, and which can be easily operated with one hand, and in the use of which injury to the parts will not be likely to occur.

It consists in two rigid jaws, each jaw having a circular groove upon its inner face, tting the roller, the jaws being pivoted to bars secured to a handle; in a sliding collar vand cross-bar, for opening and closing the jaws; in a movable sliding spindle, 'to engage with the staff of the balance-wheel, said spindle being operated by means of a lever.

In the drawings, a represents the handle of the instrument. b are twobars, permanently secured to the handle near its lower end. c c are two stiff jaws, pivotd at el d to the bars b. ce are rearward-curved extensions from the jaws,leach jaw and its extension being formed from a single piece. f is a sliding collar, located upon the handle. g is a cross-bar permanently secured to the collar f, having holesfto receive the parts e e. h is a sliding spindle, located in thelower end of the handle a, which is hollow. t' is a recess in one side of the spindle h. j is a lever, pivoted to the ears k, upon one of the bars b. l is the short arm of the lever, which passes through a long slot in the bar on which the ears k are located, and also through a similar slot in the hollow portion of the handle, and enters into and engages with the notch or recess t in the side of the spindle.

The lower end of the spindle h is hollow, to

engage with the pivot of the balance-stati', and in use the shoulder ot1 the stai' comes in contact with the end of the spindle. m is a circular groove'in the inside of each jaw, the radius of the circle being the same, or about the same, as that oi' the roller. n is the roller on the staff of the balance-wheel.

In use, the instrument is to be held in one hand, the thumb and forefinger being in the proper position for moving the sliding bar and collar, which should be in the position shown in Fig. 4, the jaws being open.- The jaws arev then` to be placed over the roller, and, by means of the thumb and finger, the sliding bar and collar can be moved up or back, closing the jaws upon the roller, as shown in Fig. l, then, by means of the second finger, the lever j, which, at this time, will be iri the position in Fig. 2, can be lifted up, as vshown in Fig. 3, bringing the end of the sliding spindle down over the pivot of the balance-staff, and forcing the balance away from the roller, the roller being held between` the jaws.

The circular groove upon the inside of the jaws insures the proper centering of the instrument, so-that the spindle will engage with the pivot of the staff, and, in connection with the stiff jaws, prevents any lateral movement or displacement of the jaws while in use.

It will be seen that during the operation one hand is free to hold the balance, the instrument being wholly operated by the other hand.

I make the handle long, so that in use its upper end will come in contact with the palm of the hand, aiding the operator'in steadying' the instrument. v

I have shown the groove or shoulder m as circular-that is the best form; but the instrument would be useful if such groove were not circular.

I do not limit myself to two jaws-three or more might be used; two are sufficient, especially when the groove is circular.-

What I claim as new, and desire to secure by Letters Patent, is as follows:

1. The independently pivoted jaws c c', having circular grooves in the faces of their turned-in ends, in` combination with thee;- tenfsionsxe e' and cross-bar g, foi" closing the jaws simultaneously, agglwgmsping the object 3. The oombinatgion'of the pivoted` jaws o4, having 'extensions e e","'slifdiii`gj lini'","gspiriY dle h, lever j, andhandle, substantially" ais and uniformly on allgsides; substantially as and for the purpose specified.

BERNARD FRESE.

lWitnesseszf L. L. BOND', A

O. W.BON1"). i

for the purpose speoied. Y

2. The stiff pvoted jaws o c', having extensions e e and the sldidg bar g, in combina.-

tion with a haudleand a spindle, h, substan-V tiailly as specified. 

